QUALITY SEAL

This article discusses the concept of sealing pavers, and its application to pedestrianised and parking areas. The concept arose in the late 1980s, when the erosion of jointing sand from pavers, used on airfield pavements, became a serious problem. A urethane pre-polymer sealer/stabiliser was developed, to prevent this form of erosion. It was later found to be effective in strengthening and improving the appearance of pavements, and preventing infiltration of water and other materials through their surfaces and joints. Then a low-viscosity polymeric sealer was developed, to counter the four forms of jointing sand erosion: (1) blast and wash from aircraft engines; (2) use of vacuum and high pressure cleaners; (3) high-velocity water flow; and (4) degradation and pumping of laying course materials. A range of water- and solvent-based polymer sealers is now available for use with concrete block paving, to improve its performance and behaviour. The three types of sealer, generally available for use with concrete block paving, are: water-based sealers, solvent-based acrylic, and moisture cure urethane. Of these, urethane is the most effective in reducing the absorption of pavers and stabilising jointing sand; it also has several other advantages.

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Authors:
    • Emery, J
  • Publication Date: 1996-7

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00729243
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM